camera2: Update CamcorderProfile documentation.
camera2: Update CamcorderProfile documentation.

Bug: 17447258

- Update documentation in CamcorderProfile for LEGACY
  mode video handling.

Change-Id: If65b93788a38ffe28caec053f81b9afa538c38a0
xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base